FAULT PLANE SOLUTION FORMAT
                         --------------------------
This document is maintained by David Oppenheimer           May 20, 1993

The format of the fault plane solutions produced by FPFIT are HYPO71 summary
cards in columns 1-80 augmented with the fault-plane solution parameters. The 
FORTRAN formats below are to be used for reading the fields.  For more 
information see

   Reasenberg, P. A., and D. Oppenheimer, 1985, FPFIT, FPPLOT, and FPPAGE: 
   Fortran computer programs for calculating and displaying earthquake 
   fault-plane solutions, U.S. Geol. Surv. Open-File Rep. 85-739.


Cols.  Format    Data
_____  ______    ____

1-6    3I2, 1X   Year, month and day.
8-11   2I2       Hour and minute.
12-17  F6.2      Origin time seconds.
18-20  F3.0      Latitude (deg).
21     A1        S for south, blank otherwise.
22-26  F5.2      Latitude (min).
27-30  F4.0      Longitude (deg).
31     A1        E for east, blank otherwise.
32-36  F5.2      Longitude (min).
37-43  F7.2, 2X  Depth (km).
46-50  F5.2      Magnitude.  See col. 80 for code
51-53  I3        Number of P & S times with weights greater than 0.1.
54-57  F4.0      Maximum azimuthal gap.
58-62  F5.1      Distance to nearest station (km).
63-67  F5.2      RMS travel time residual.
68-72  F5.1      Horizontal error (km).
73-77  F5.1, 2X  Vertical error (km).
80     A1, 1X    If data source is Hypoinverse, then code designates type of 
		 magnitude posted in cols. 46-50. L=ML based on above location,
		 B=ML from UC Berkeley, C=coda, A=amplitude
82-84  F3.0, 1X  Dip direction (downdip azimuth in degrees,clockwise from north)
86-87  F2.0      Dip angle in degrees down from horizontal
88-91  F4.0, 2X  Rake in degrees: 0=left lateral, 90=reverse, +-180=right 
                 lateral, -90=normal
94-97  F4.2, 1X  Solution misfit value. 0=perfect fit, 1=perfect misfit (never 
                 exceeds 0.5 in reality).
99-101 I3, 1X    Number of first motion observations used in solution
103-107 F5.2, 1X  Solution misfit value + 90% confidence estimate.  Useful for
                 testing whether restricted solutions are within uncertainty
                 region of free solution
109-112 F4.2, 1X Station distribution ratio (0-1).  Lower numbers indicate 
                 data lie near nodal planes.
114-117 F4.2, 2X (# of machine picks)/(# of hand picks)
120-121 F2.0, 1X ~90% confidence range of strike
123-124 F2.0, 1X ~90% confidence range of dip
126-127 F2.0     ~90% confidence range of rake
128     A1       Convergence flag: C=no convergence; otherwise blank
129     A1       Multiple solution flag: *=multiple; otherwise blank
130-139 I10      Event ID # found in Hypoinverse archive file